Supplier Page from Thermo Fisher Scientific for Fast Blue BB salt
1,2-Ethanedithiol, 95% from Thermo Fisher Scientific
2,6-Lutidine, 99% from Thermo Fisher Scientific
Fumaric acid, 99+% from Thermo Fisher Scientific
Sulfur trioxide pyridine complex, technical, 48-50% active SO3 from Thermo Fisher Scientific